<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>login</title>
</head>
<body>

    <form action="<%=request.getContextPath()%>/demo/login" method="post">
        用户名：<input type="text" name="username">
        密码：<input type="text" name="password">
        <input type="submit" value="登录">
        <p>${backInfo}</p>
    </form>

</body>
</html>
